Product Overview
The Schneider TM2ALM3LT is a high-performance Input/Output analog module designed for the Modicon M238 logic controller series. This module brings precision analog measurement and control to your automation system, featuring two low-level inputs for thermocouples or temperature probes and one analog output configurable for current or voltage signals. Whether you are upgrading an existing M238 installation or replacing older analog modules, the TM2ALM3LT offers a compact, reliable solution for demanding temperature monitoring and control applications.
Technical Specifications
Below are the key specifications for the Schneider TM2ALM3LT, ensuring accurate and repeatable performance in industrial environments.
| Parameter |
Value |
| Analogue Input Number |
2 |
| Input Level |
Low level |
| Analogue Input Types |
Temperature probe (Pt100, 3-wire, -100…500 °C), Thermocouple J (0…1200 °C), K (0…1300 °C), T (0…400 °C) |
| Analogue Output Number |
1 |
| Analogue Output Types |
Current 4…20 mA, Voltage 0…10 V |
| Resolution |
12 bits (both input and output) |
| Acquisition Period |
60 ms per channel + 1 controller cycle (thermocouple), 80 ms per channel + 1 controller cycle |
| Measurement Error |
±0.2% of full scale at 25 °C (typical per type) |
| Supply Voltage |
24 V DC (19.2…30 V DC) |
| Current Consumption |
50 mA at 24 V DC external, 50 mA at 5 V DC internal |
| Weight |
0.085 kg |
| Dimensions (WxHxD) |
23.5 x 90 x 70 mm |
Compatibility & Integration
The TM2ALM3LT is fully compatible with the Modicon M238 logic controller series, as well as the Advantys OTB and Twido platforms. It connects via the controller’s expansion bus and is powered by an external 24 V DC supply. The module uses a removable screw terminal block for easy wiring of sensors and actuators. Integration requires no special software beyond the standard controller programming environment. This makes the TM2ALM3LT an ideal upgrade path for systems that need to add analog temperature measurement without replacing the entire controller.
Industry Applications
With its dual thermocouple/temperature probe inputs and one analog output, the Schneider TM2ALM3LT is well-suited for applications requiring precise temperature monitoring and control. Common use cases include:
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Plastic injection molding: Monitor barrel and nozzle temperatures using Type J or K thermocouples, with the analog output driving a proportional valve or heater.
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Packaging machinery: Measure heat-seal bar temperature with a Pt100 probe and adjust the heating element via the 4-20 mA output.
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Laboratory ovens: Replace older discrete sensors with the TM2ALM3LT for higher accuracy and reduced wiring complexity.
Installation & Setup Guidance
The TM2ALM3LT mounts directly onto the Modicon M238 controller or expansion rail. Ensure the module is correctly keyed and seated. Use shielded cable for all analog wiring, as specified in the datasheet, to minimize electrical noise. Connect the thermocouples or Pt100 probes to the appropriate input terminals, observing polarity. For the output, select either current (4-20 mA) or voltage (0-10 V) mode via the configuration software. Power the module with 24 V DC within the 19.2-30 V tolerance. Always verify wiring before powering up the system.
Selection Guide & Purchasing Advice
Before purchasing the TM2ALM3LT, confirm that your Modicon M238 controller has an available expansion slot and that the total number of expansion modules does not exceed the controller’s limit. Also verify the sensor types you intend to connect: the module supports thermocouples J, K, T (0-1200, 1300, 400 °C) and 3-wire Pt temperature probes (-100 to 500 °C). If your application requires different sensor types or additional channels, consider alternative expansion modules. For genuine Schneider parts and fast delivery, UBEST Automation is your trusted source. Visit ubest101.myshopify.com for more details and competitive pricing.